Improvement in adjustable extension-chairs



3 Sheets-Sheet 1 G. N. SEIDLER.

ADJUSTABLE EXTENSION" CHAIR.

No. 187,490. Patented.Feb.20, 1877.

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v 3 Sheets- 81112 9L2.

G. N. SEIDLER.

ADJUSTABLE EXTENSION CHAIR.

No. 187,490, Patented Feb. 20, 1877'.

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UNITED STATES PATENT GEORGE N. SEIDLER, OF HARTFORD, CONNECTICUT, ASSIGNOR OF ONE-HALF HIS RIGHT TO CHARLES MAY, OF SAME PLACE.

IMPROVEMENT IN ADJUSTABLE EXTENSION-CHAIRS.

Specification forming part of Letters Patent No. 187,490, dated February .20, 1877; application filed February 3, 1876.

To all whom it may concern Be it known that I, GEORGE N. SEIDLER, of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements Pertaining to an Adjustable Extension-Chair, of which the following is a specification, reference beinghad to the accompanying drawings, where Figure 1 is a top view (upholstery omitted) with the parts adjusted in the position of a common chair. Fig. 2 is a top view of the same, extended. Fig. 3 is a side view with the parts in the same position as in Fig. 1. Fig. 4 is a side View with the parts in the same position as in Fig. 2. Fig. 5 is a detail view of a ratchet-arm, hereinafter spoken of, with cross-section of operating rod and side view of cam. Fig. 6 is a View of the chair in vertical section, with the parts adjusted in the position of a common chair. Fig. 7 is a sectional View on the same plane as Fig. 6, with the parts extended.

The letters (1 denote the common chairframe; I) b, the arms thereof; 0, the back d (1, partial arms secured to the back and pivoted to arms I) b by hinges e c; f, the sliding seat hinged at the rear to the back 0 by hinges gg, and sliding at the front on cross-bar h; t, a ratchet-arm, pivoted at the rear to a part of the sliding seat, and meshing with the stationary pawl or spurj rising from the cross-bar h,- lc, an operating rod bearing the cam Z, by the partial rotation of which the cam is made to strike the lateral leaf of arm 4? and raise it off the spurj; m, a footrest, hung by cranked arms n in the footrcst frame 0, the rear part of which slides by eyes p on rods 1, and the front part of which slides by its rods 8 in eyes 1..

The ratchet-arm i resting on and meshing with the spur j, holds the seat and back at any desired position of adjustment. A person, bypartially rotating the rod 70 by means of one of the knobs u, rotates the cam 1, thereby raising arm t from mesh with spur j, so that the seat can be adjusted forward as desired. Theseatadjusts backward by pressure merely. The partial arms at d are requisite, in order to permit much if any movement of the seat without materially disturbing its level, for the foot of the swinging back is hinged to the rear of the sliding seat; and were it not for these partial arms a forward movement of the seat would raise the rear of the seat.

The foot-rest frame slides readily in and out on its rods, and when the frame is drawn out the rest m is pulled out to position shown in Figs. 2, 4, and 7, and is there held by the stop or cleat r resting against the front end of the foot-rest frame.

The arms b b are supported just in front of hinges c e by supports 2) o.

I am aware that I am not the first to combine, in a chair, a seatframe sliding back and forth in a horizontal plane, and a vibrating back, hinged at its lower end to the rear of the seat frame, and supported laterally by pi-votal connections with standards which are rigidly secured to the chair-support, and I disclaim such combination.

1 claim as myinvention- 1. The partial arms cl (1, rigidly secured to the back 0, and jointed by hinges e c to arms I) b, substantially as shown and described.

2. In combination, sliding seat f, pivoted and ratchet-arm t, spur j, and operatingrod 70, hearing cam Z, all substantially as and for the purpose set forth.

GEO. N. SEIDLER.

Witnesses:

W. E. SIMONDS, ROBT. F. GAYLORD. 

